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* Merge branch 'next' of ↵Linus Torvalds2009-12-11
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interface [CPUFREQ] make internal cpufreq_add_dev_* static [CPUFREQ] use an enum for speedstep processor identification [CPUFREQ] Document units for transition latency [CPUFREQ] Use global sysfs cpufreq structure for conservative governor tunings [CPUFREQ] Documentation: ABI: /sys/devices/system/cpu/cpu#/cpufreq/ [CPUFREQ] powernow-k6: set transition latency value so ondemand governor can be used [CPUFREQ] cpumask: don't put a cpumask on the stack in x86...cpufreq/powernow-k8.c
| * [ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interfaceThomas Renninger2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This interface is mainly intended (and implemented) for ACPI _PPC BIOS frequency limitations, but other cpufreq drivers can also use it for similar use-cases. Why is this needed: Currently it's not obvious why cpufreq got limited. People see cpufreq/scaling_max_freq reduced, but this could have happened by: - any userspace prog writing to scaling_max_freq - thermal limitations - hardware (_PPC in ACPI case) limitiations Therefore export bios_limit (in kHz) to: - Point the user that it's the BIOS (broken or intended) which limits frequency - Export it as a sysfs interface for userspace progs. While this was a rarely used feature on laptops, there will appear more and more server implemenations providing "Green IT" features like allowing the service processor to limit the frequency. People want to know about HW/BIOS frequency limitations. All ACPI P-state driven cpufreq drivers are covered with this patch: - powernow-k8 - powernow-k7 - acpi-cpufreq Tested with a patched DSDT which limits the first two cores (_PPC returns 1) via _PPC, exposed by bios_limit: # echo 2200000 >cpu2/cpufreq/scaling_max_freq # cat cpu*/cpufreq/scaling_max_freq 2600000 2600000 2200000 2200000 # #scaling_max_freq shows general user/thermal/BIOS limitations # cat cpu*/cpufreq/bios_limit 2600000 2600000 2800000 2800000 # #bios_limit only shows the HW/BIOS limitation CC: Pallipadi Venkatesh <venkatesh.pallipadi@intel.com> CC: Len Brown <lenb@kernel.org> CC: davej@codemonkey.org.uk CC: linux@dominikbrodowski.net Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Dave Jones <davej@redhat.com>
* | Merge branch 'linux-next' of ↵Linus Torvalds2009-12-11
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (109 commits) PCI: fix coding style issue in pci_save_state() PCI: add pci_request_acs PCI: fix BUG_ON triggered by logical PCIe root port removal PCI: remove ifdefed pci_cleanup_aer_correct_error_status PCI: unconditionally clear AER uncorr status register during cleanup x86/PCI: claim SR-IOV BARs in pcibios_allocate_resource PCI: portdrv: remove redundant definitions PCI: portdrv: remove unnecessary struct pcie_port_data PCI: portdrv: minor cleanup for pcie_port_device_register PCI: portdrv: add missing irq cleanup PCI: portdrv: enable device before irq initialization PCI: portdrv: cleanup service irqs initialization PCI: portdrv: check capabilities first PCI: portdrv: move PME capability check PCI: portdrv: remove redundant pcie type calculation PCI: portdrv: cleanup pcie_device registration PCI: portdrv: remove redundant pcie_port_device_probe PCI: Always set prefetchable base/limit upper32 registers PCI: read-modify-write the pcie device control register when initiating pcie flr PCI: show dma_mask bits in /sys ... Fixed up conflicts in: arch/x86/kernel/amd_iommu_init.c drivers/pci/dmar.c drivers/pci/hotplug/acpiphp_glue.c
| * | PCI: PCIe AER: honor ACPI HEST FIRMWARE FIRST modeMatt Domsch2009-11-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Feedback from Hidetoshi Seto and Kenji Kaneshige incorporated. This correctly handles PCI-X bridges, PCIe root ports and endpoints, and prints debug messages when invalid/reserved types are found in the HEST. PCI devices not in domain/segment 0 are not represented in HEST, thus will be ignored. Today, the PCIe Advanced Error Reporting (AER) driver attaches itself to every PCIe root port for which BIOS reports it should, via ACPI _OSC. However, _OSC alone is insufficient for newer BIOSes. Part of ACPI 4.0 is the new APEI (ACPI Platform Error Interfaces) which is a way for OS and BIOS to handshake over which errors for which components each will handle. One table in ACPI 4.0 is the Hardware Error Source Table (HEST), where BIOS can define that errors for certain PCIe devices (or all devices), should be handled by BIOS ("Firmware First mode"), rather than be handled by the OS. Dell PowerEdge 11G server BIOS defines Firmware First mode in HEST, so that it may manage such errors, log them to the System Event Log, and possibly take other actions. The aer driver should honor this, and not attach itself to devices noted as such. Furthermore, Kenji Kaneshige reminded us to disallow changing the AER registers when respecting Firmware First mode. Platform firmware is expected to manage these, and if changes to them are allowed, it could break that firmware's behavior. The HEST parsing code may be replaced in the future by a more feature-rich implementation. This patch provides the minimum needed to prevent breakage until that implementation is available. Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Matt Domsch <Matt_Domsch@dell.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | | Merge branch 'acpica' of ↵Linus Torvalds2009-12-09
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'acpica' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: ACPICA: Update version to 20091112. ACPICA: Add additional module-level code support ACPICA: Deploy new create integer interface where appropriate ACPICA: New internal utility function to create Integer objects ACPICA: Add repair for predefined methods that must return sorted lists ACPICA: Fix possible fault if return Package objects contain NULL elements ACPICA: Add post-order callback to acpi_walk_namespace ACPICA: Change package length error message to an info message ACPICA: Reduce severity of predefined repair messages, Warning to Info ACPICA: Update version to 20091013 ACPICA: Fix possible memory leak for Scope ASL operator ACPICA: Remove possibility of executing _REG methods twice ACPICA: Add repair for bad _MAT buffers ACPICA: Add repair for bad _BIF/_BIX packages
| * | | ACPICA: Add additional module-level code supportLin Ming2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change will execute module-level code that is not at the root of the namespace (under a Device object, etc.). ACPICA BZ 762. http://www.acpica.org/bugzilla/show_bug.cgi?id=762 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: Deploy new create integer interface where appropriateBob Moore2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Simplifies creation of simple integer objects. ACPICA BZ 823. http://www.acpica.org/bugzilla/show_bug.cgi?id=823 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: New internal utility function to create Integer objectsBob Moore2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | acpi_ut_create_integer_object. This function (when deployed) should simplify some of the object creation code. ACPICA BZ 823. http://www.acpica.org/bugzilla/show_bug.cgi?id=823 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: Add repair for predefined methods that must return sorted listsBob Moore2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change will repair (by sorting) packages returned by _ALR, _PSS, and _TSS. Drivers can now assume that the packages are correctly sorted. Adds one new file, nsrepair2.c. ACPICA BZ 784. http://www.acpica.org/bugzilla/show_bug.cgi?id=784 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: Fix possible fault if return Package objects contain NULL elementsBob Moore2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For predefined name validation. Also adds a warning if a NULL element is followed by any non-null elements. ACPICA BZ 813, 814. http://www.acpica.org/bugzilla/show_bug.cgi?id=813 http://www.acpica.org/bugzilla/show_bug.cgi?id=814 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: Add post-order callback to acpi_walk_namespaceLin Ming2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The existing interface only has a pre-order callback. This change adds an additional parameter for a post-order callback which will be more useful for bus scans. ACPICA BZ 779. Also update the external calls to acpi_walk_namespace. http://www.acpica.org/bugzilla/show_bug.cgi?id=779 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: Change package length error message to an info messageBob Moore2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This message happens when the package element list is longer than the declared length of the package. Changed to an info message because this condition is not actually an error. It is caused by the BIOS attempting to truncate the package on the fly by adjusting the package element count at the start of the package definition. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: Reduce severity of predefined repair messages, Warning to InfoBob Moore2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the object was successfully repaired, a Warning is too severe. Reduced to Info for now. We may eventually change these messages to debug-only. ACPICA BZ 812. http://www.acpica.org/bugzilla/show_bug.cgi?id=812 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: Fix possible memory leak for Scope ASL operatorLin Ming2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using Scope(\) to change the scope to the root could cause a single object memory leak. Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: Remove possibility of executing _REG methods twiceLin Ming2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a custom address space handler is installed by the host before the "initialize operation regions" phase of the ACPICA initialization, any _REG methods for that address space could be executed twice. This change fixes the problem. ACPICA BZ 427. http://www.acpica.org/bugzilla/show_bug.cgi?id=427 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: Add repair for bad _MAT buffersLin Ming2009-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | _MAT can inadvertently return an Integer instead of a Buffer if the return value has been read from a Field whose width is less than or equal to the global integer width (32 or 64 bits). ACPICA BZ 810. http://www.acpica.org/bugzilla/show_bug.cgi?id=810 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPICA: Add repair for bad _BIF/_BIX packagesBob Moore2009-11-24
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a repair for the "Oem Information" field which is often mistakenly returned as an integer. It should always be a string. ACPICA BZ 807. http://www.acpica.org/bugzilla/show_bug.cgi?id=807 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2009-12-09
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (42 commits) tree-wide: fix misspelling of "definition" in comments reiserfs: fix misspelling of "journaled" doc: Fix a typo in slub.txt. inotify: remove superfluous return code check hdlc: spelling fix in find_pvc() comment doc: fix regulator docs cut-and-pasteism mtd: Fix comment in Kconfig doc: Fix IRQ chip docs tree-wide: fix assorted typos all over the place drivers/ata/libata-sff.c: comment spelling fixes fix typos/grammos in Documentation/edac.txt sysctl: add missing comments fs/debugfs/inode.c: fix comment typos sgivwfb: Make use of ARRAY_SIZE. sky2: fix sky2_link_down copy/paste comment error tree-wide: fix typos "couter" -> "counter" tree-wide: fix typos "offest" -> "offset" fix kerneldoc for set_irq_msi() spidev: fix double "of of" in comment comment typo fix: sybsystem -> subsystem ...
| * \ \ Merge branch 'for-next' into for-linusJiri Kosina2009-12-07
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: kernel/irq/chip.c
| | * | | tree-wide: fix some typos and punctuation in commentsThadeu Lima de Souza Cascardo2009-12-04
| | | |/ | | |/| | | | | | | | | | | | | | | | | | | | | fix some typos and punctuation in comments Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | | | Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds2009-12-08
|\ \ \ \ | |/ / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (36 commits) x86, mm: Correct the implementation of is_untracked_pat_range() x86/pat: Trivial: don't create debugfs for memtype if pat is disabled x86, mtrr: Fix sorting of mtrr after subtracting x86: Move find_smp_config() earlier and avoid bootmem usage x86, platform: Change is_untracked_pat_range() to bool; cleanup init x86: Change is_ISA_range() into an inline function x86, mm: is_untracked_pat_range() takes a normal semiclosed range x86, mm: Call is_untracked_pat_range() rather than is_ISA_range() x86: UV SGI: Don't track GRU space in PAT x86: SGI UV: Fix BAU initialization x86, numa: Use near(er) online node instead of roundrobin for NUMA x86, numa, bootmem: Only free bootmem on NUMA failure path x86: Change crash kernel to reserve via reserve_early() x86: Eliminate redundant/contradicting cache line size config options x86: When cleaning MTRRs, do not fold WP into UC x86: remove "extern" from function prototypes in <asm/proto.h> x86, mm: Report state of NX protections during boot x86, mm: Clean up and simplify NX enablement x86, pageattr: Make set_memory_(x|nx) aware of NX support x86, sleep: Always save the value of EFER ... Fix up conflicts (added both iommu_shutdown and is_untracked_pat_range) to 'struct x86_platform_ops') in arch/x86/include/asm/x86_init.h arch/x86/kernel/x86_init.c
| * | | x86: Export srat physical topologyDavid Rientjes2009-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the counterpart to "x86: export k8 physical topology" for SRAT. It is not as invasive because the acpi code already seperates node setup into detection and registration steps, with the exception of registering e820 active regions in acpi_numa_memory_affinity_init(). This is now moved to acpi_scan_nodes() if NUMA emulation is disabled or deferred. acpi_numa_init() now returns a value which specifies whether an underlying SRAT was located. If so, that topology can be used by the emulation code to interleave emulated nodes over physical nodes or to register the nodes for ACPI. acpi_get_nodes() may now be used to export the srat physical topology of the machine for NUMA emulation. Signed-off-by: David Rientjes <rientjes@google.com> Cc: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Ankita Garg <ankita@in.ibm.com> Cc: Len Brown <len.brown@intel.com> LKML-Reference: <alpine.DEB.1.00.0909251518580.14754@chino.kir.corp.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | Merge branch 'thinkpad-2.6.32' into releaseLen Brown2009-11-25
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| * | | | ACPI: Add Thinkpad T400, T500 to OSI(Linux) white-listJerone Young2009-11-24
| | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | acpi_osi=Linux helps the mute button work properly by sending Linux a mute key press. http://bugzilla.kernel.org/show_bug.cgi?id=13934 Signed-off-by: Jerone Young <jerone.young@canonical.com> Signed-off-by: Len Brown <len.brown@intel.com>
* | | | Merge branch 'bugzilla-14379' into releaseLen Brown2009-11-25
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| * | | | ACPICA: Silence the warning about _BIF returning the bufferAlexey Starikovskiy2009-11-24
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | _BIF was returning buffer instead of a string since day 1 of ACPI. Adding a warning for that is noble, but people don't like when someone cries wolf in a production system. Reference: http://bugzilla.kernel.org/show_bug.cgi?id=14379 Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
* / / / ACPI: DMI init_set_sci_en_on_resume for HP-Compaq C700Len Brown2009-11-23
|/ / / | | | | | | | | | | | | | | | | | | | | | ...else ACPI thermal controls fail after resume. http://bugzilla.kernel.org/show_bug.cgi?id=13745 Signed-off-by: Len Brown <len.brown@intel.com>
* | | Merge branch 'bugzilla-13449' into releaseLen Brown2009-11-06
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| * | | ACPI: sleep: another HP/Compaq DMI entries for init_set_sci_en_on_resumeVaibhav Verma2009-11-05
| | | | | | | | | | | | | | | | | | | | | | | | http://bugzilla.kernel.org/show_bug.cgi?id=13745 Signed-off-by: Len Brown <len.brown@intel.com>
| * | | ACPI: add DMI entry for SCI_EN resume quirk on HP dv4Gustavo Maciel Dias Vieira2009-11-05
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes the missing battery on sleep problem for yet another HP laptop ("HP Pavilion dv4"). Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=13449 Signed-off-by: Gustavo Maciel Dias Vieira <gustavo@sagui.org> Signed-off-by: Len Brown <len.brown@intel.com>
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*-. \ \ Merge branches 'misc', 'eeepc-laptop' and 'bugzilla-14445' into releaseLen Brown2009-11-05
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| | * | ACPICA: avoid "Info: mapping multiple BARs. Your kernel is fine."Bob Moore2009-11-05
| |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure that memory mappings created for operation regions do not cross page boundaries. Crossing a page boundary while mapping regions can cause warnings if the pages have different attributes. Such regions are probably BIOS bugs, and this is the workaround. http://bugzilla.kernel.org/show_bug.cgi?id=14445 [Kernel summit hacking hour] Signed-off-by: Bob Moore <robert.moore@intel.com> Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: Move dereference after NULL testJulia Lawall2009-11-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the NULL test on pr is needed, then the dereference should be after the NULL test. A simplified version of the semantic match that detects this problem is as follows (http://coccinelle.lip6.fr/): // <smpl> @match exists@ expression x, E; identifier fld; @@ * x->fld ... when != \(x = E\|&x\) * x == NULL // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: add __cpuinit to acpi_processor_add()Rakib Mullick2009-11-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Annote acpi_processor_add with cpuinit since it calls a cpuinit function acpi_processor_power_init and fixes a section mismatch warning. We were warned by the following warning: LD drivers/acpi/processor.o WARNING: drivers/acpi/processor.o(.text+0x1829): Section mismatch in reference from the function acpi_processor_add() to the function .cpuinit.text:acpi_processor_power_init() The function acpi_processor_add() references the function __cpuinit acpi_processor_power_init(). This is often because acpi_processor_add lacks a __cpuinit annotation or the annotation of acpi_processor_power_init is wrong. Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
| * | acpi-power-meter: Don't leak ACPI error codes to userspaceDarrick J. Wong2009-11-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the ACPI methods return an error code, we must return -EINVAL to userspace to flag the error. Right now we pass the (positive) number right through, which causes echo to keep writing bogus values. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: clean up video.c boundary checks and typesArjan van de Ven2009-10-28
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | proc.c and video.c are a bit sloppy around types and style, confusing gcc for a new feature that'll be in 2.6.33 and will cause a warning on the current code. This patch changes if (foo + 1 > sizeof bar) into if (foo >= sizeof(bar)) which is more kernel-style. it also changes a variable in proc.c to unsigned; it gets assigned a value from an unsigned type, and is then only compared for > not for negative, so using unsigned is just outright the right type Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* | Merge branch 'misc' into releaseLen Brown2009-10-15
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| * | ACPI button: don't try to use a non-existent lid deviceJesse Barnes2009-10-13
| | | | | | | | | | | | | | | | | | | | | | | | If a call comes in to check the lid state but there's no lid device present, we should return -ENODEV. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: Kconfig, fix proc aggregator textJiri Slaby2009-10-09
| | | | | | | | | | | | | | | | | | | | | Fix two typos in the Kconfig text about ACPI_PROCESSOR_AGGREGATOR. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: add AC/DC notifierMark Langsdorf2009-10-06
| |/ | | | | | | | | | | | | Add an ACPI event notifier for AC/DC connect/disconnect events. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: Len Brown <len.brown@intel.com>
* | Merge branch 'launchpad-333386' into releaseLen Brown2009-10-15
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| * | ACPI: video: Loosen strictness of video bus detection codeStefan Bader2009-10-13
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | BugLink: http://bugs.launchpad.net/bugs/333386 Currently a video bus device must (beside other criteria) define _DOD and _DOS methods to be considered a video device. Some broken BIOSes prevented working backlight control by only defining both for one (non-existing bus) and only _DOD for the rest. With this patch in place the other bus definitions were considered too and backlight control started to work again. Signed-off-by: Stefan Bader <stefan.bader@canonical.com> Acked-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* / ACPI / PCI: Fix NULL pointer dereference in acpi_get_pci_dev() (rev. 2)Rafael J. Wysocki2009-10-13
|/ | | | | | | | | | | | | | | | | | | | | | | | | | acpi_get_pci_dev() may be called for a non-PCI device, in which case it should return NULL. However, it assumes that every handle it finds in the ACPI CA name space, between given device handle and the PCI root bridge handle, corresponds to a PCI-to-PCI bridge with an existing secondary bus. For this reason, when it finds a struct pci_dev object corresponding to one of them, it doesn't check if its 'subordinate' field is a valid pointer. This obviously leads to a NULL pointer dereference if acpi_get_pci_dev() is called for a non-PCI device with a PCI parent which is not a bridge. To fix this issue make acpi_get_pci_dev() check if pdev->subordinate is not NULL for every device it finds on the path between the root bridge and the device it's supposed to get to and return NULL if the "target" device cannot be found. http://bugzilla.kernel.org/show_bug.cgi?id=14129 (worked in 2.6.30, regression in 2.6.31) Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Reported-by: Danny Feng <dfeng@redhat.com> Reviewed-by: Alex Chiang <achiang@hp.com> Tested-by: chepioq <chepioq@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
* Merge branch 'acpi-pad' of ↵Linus Torvalds2009-10-04
|\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'acpi-pad' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: acpi_pad: build only on X86 ACPI: create Processor Aggregator Device driver Fixup trivial conflicts in MAINTAINERS file.
| * acpi_pad: build only on X86Len Brown2009-09-27
| | | | | | | | | | | | X86_FEATURE_MWAIT doesn't exist on ia64... Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: create Processor Aggregator Device driverShaohua Li2009-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ACPI 4.0 created the logical "processor aggregator device" as a mechinism for platforms to ask the OS to force otherwise busy processors to enter (power saving) idle. The intent is to lower power consumption to ride-out transient electrical and thermal emergencies, rather than powering off the server. On platforms that can save more power/performance via P-states, the platform will first exhaust P-states before forcing idle. However, the relative benefit of P-states vs. idle states is platform dependent, and thus this driver need not know or care about it. This driver does not use the kernel's CPU hot-plug mechanism because after the transient emergency is over, the system must be returned to its normal state, and hotplug would permanently break both cpusets and binding. So to force idle, the driver creates a power saving thread. The scheduler will migrate the thread to the preferred CPU. The thread has max priority and has SCHED_RR policy, so it can occupy one CPU. To save power, the thread will invoke the deep C-state entry instructions. To avoid starvation, the thread will sleep 5% of the time time for every second (current RT scheduler has threshold to avoid starvation, but if other CPUs are idle, the CPU can borrow CPU timer from other, which makes the mechanism not work here) Vaidyanathan Srinivasan has proposed scheduler enhancements to allow injecting idle time into the system. This driver doesn't depend on those enhancements, but could cut over to them when they are available. Peter Z. does not favor upstreaming this driver until the those scheduler enhancements are in place. However, we favor upstreaming this driver now because it is useful now, and can be enhanced over time. Signed-off-by: Shaohua Li <shaohua.li@intel.com> NACKed-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Len Brown <len.brown@intel.com>
* | Merge branch 'misc' into releaseLen Brown2009-10-03
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| * | ACPI: dock: fix "sibiling" typoAlex Chiang2009-10-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Crossword clues as haikus: Snakes from the same brood fighting Jackson on a plane? sibilant siblings I guess Will Shortz's job is still secure. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: kill overly verbose "throttling states" log messagesRoland Dreier2009-10-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I was recently lucky enough to get a 64-CPU system. The processors actually have T-states, so my kernel log ends up with 64 lines like: ACPI: Processor [CPU0] (supports xx throttling states) This is pretty useless clutter because - this info is already available after boot from /proc/acpi/processor/CPUnn/throttling - there's also an ACPI_DEBUG_PRINT() in processor_throttling.c that gives the same info on boot for anyone who *really* cares. So just delete the code that prints the throttling states in processor_core.c. Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: Fix bound checks for copy_from_user in the acpi /proc codeArjan van de Ven2009-10-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ACPI /proc write() code takes an unsigned length argument like any write() function, but then assigned it to a *signed* integer called "len". Only after this is a sanity check for len done to make it not larger than 4. Due to the type change a len < 0 is in principle also possible; this patch adds a check for this. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>